Order †Ornithischia Seeley, 1887
Parvorder †Genasauria Sereno, 1986
see Clade Genasauria Sereno 1986
Nanorder †Cerapoda Sereno, 1986
see Suborder Cerapoda Sereno, 1986
Hypoorder †Marginocephalia Sereno, 1986
see Clade Marginocephalia Sereno 1986
Suborder †Pachycephalosauria Maryañska & Osmólska, 1974
see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974
Infraorder †Goyocephalia Sereno, 1986
see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974
Superfamily †Homalocephaloidea Dong, 1978
see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974
Genus †Homalocephale Maryañska & Osmólska, 1974